NB2308AI5HDTR2G

Overview

The NB2308AI5HDTR2G is a 3.3 V zero delay clock buffer manufactured by onsemi, designed for distributing high-speed clocks up to 133.3 MHz. It features an internal PLL that locks to the reference input on the REF pin, with feedback driven from one of the outputs to the FBK pin. The device provides eight buffered clock outputs organized into two banks of four (Bank A and Bank B). In this specific configuration, both output banks provide a divided-by-two frequency relative to the reference input. The part operates within a supply voltage range of 3.0 V to 3.6 V and supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• Zero Delay Buffer: Input-to-output propagation delay is guaranteed less than 250 ps, adjustable via capacitive load on the FBK input.
• Low Skew Performance: Output-to-output skew is less than 200 ps; device-to-device skew is less than 700 ps.
• Configurable Outputs: Two banks of four outputs each, controllable via S1 and S2 select inputs for three-stating or direct reference application.
• High-Drive Capability: The 'H' suffix indicates a high-drive version with faster rise and fall times compared to standard variants.

Applications

• Distributing high-speed system clocks in industrial and commercial electronics.
• Clock distribution networks requiring low skew between multiple downstream components.
• Systems utilizing multiple NB2308A devices where inter-device skew must be minimized.

Procurement Notes

Verify the component status as the NB2308A series may be subject to discontinuation notices. Confirm the package type matches the design requirements, as the 'DT' suffix denotes TSSOP-16 while 'D' denotes SOIC-16. Ensure the ordering suffix corresponds to the correct tape and reel quantity if bulk procurement is required. Check for RoHS compliance markings indicated by the 'G' suffix.

Selection Notes

Select the NB2308AI5HDTR2G when a divide-by-two clock distribution is required for both output banks. The 'I' suffix specifies the industrial temperature range (-40°C to +85°C), suitable for harsher environments compared to commercial parts. The 'H' variant offers improved drive strength and switching speeds. Ensure the feedback path connects to an output capable of driving the necessary load capacitance (15 pF at frequencies above 100 MHz) to maintain zero delay characteristics.

Part Context

This component belongs to the NB2308A family of 3.3 V zero delay buffers. Variants are distinguished by their frequency multiplication/division ratios (x1, x2, x3, x4, x5H) and drive strengths. The AI5H designation specifically identifies the industrial grade, high-drive version configured for REF/2 outputs on both banks. Other family members include NB2308AC1 through NB2308AC5H for commercial grades.

Replacement Considerations

Publicly confirmed substitute part numbers for NB2308AI5HDTR2G were not found in the provided source material. Cross-referencing requires matching the 1:8 ratio, REF/2 configuration, and TSSOP-16 package constraints.